A GPU based Algorithm for Determining the Optimal Cutting Direction in Deep Mold Machining
A GPU based Algorithm for Determining the Optimal Cutting Direction in Deep Mold Machining
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DOI：
10.1109/isam.2007.4288473
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发表时间：
2007-07
期刊：
影响因子：
--
通讯作者：
K. Morimoto;M. Inui
中科院分区：
文献类型：
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作者：
K. Morimoto;M. Inui
在汽车保险杠和内嵌板的生产中，大模具的应用非常广泛。为了实现此类深模的精密稳定加工，通常采用斜刀三轴铣削。本文提出了一种确定这种倾斜加工中最优切削方向的新算法。引入可达锥的概念，作为评价倾斜加工稳定性和安全性的指标，并将可达锥峰值角最大的方向定义为最优切削方向。可以通过绘制模具偏移形状的剪影图来导出特定切割方向的可达锥。这种计算可以通过使用图形处理单元（GPU）来加速，现在大多数个人电脑都配备了GPU。实现了该算法，并利用该技术开发了一个工艺规划辅助实验程序。
Large molds with very deep shape are well used in producing bumpers and inner panels of automobiles. In order to realize the precise and stable machining of such deep molds, 3-axis milling with inclined cutters are often applied. In this paper, we propose a new algorithm for determining the optimal cutting direction in such inclined machining. We introduce a concept of accessibility cone as a measure for evaluating the stability and safety in the inclined machining, and we define the optimal cutting direction as the direction whose corresponding accessibility cone has the maximum peak angle. An accessibility cone for a specific cutting direction can be derived by rendering a silhouette picture of the offset shape of the mold. This computation can be accelerated by using a graphics processing unit (GPU) which is now equipped in most PCs. Proposed algorithm is implemented and an experimental process planning assistance program using this technology is demonstrated.